Mount Holly, NJ – Intense thunderstorms are bringing a dangerous flood threat across New Jersey, southeastern Pennsylvania, northern Delaware, and eastern Maryland through midnight tonight, with rainfall rates topping 2 inches per hour in some spots.
According to the National Weather Service in Mount Holly, a Flood Watch remains in effect for cities including Camden, Trenton, Atlantic City, Philadelphia, Wilmington, and Dover until 12 a.m. Wednesday. Forecasters warn that a slow-moving frontal boundary will clash with a tropical airmass, producing widespread downpours and the risk of flash flooding.
Low-lying and poor-drainage areas, such as Center City Philadelphia, Newark, and Atlantic City, could see water quickly rise, making urban roads and underpasses hazardous. Commuters should expect road closures along key routes like I-295, Route 30, and Route 1, especially during the evening rush. Some creeks and streams—including the Schuylkill River and Rancocas Creek—may overflow if rainfall intensifies.
Residents are urged to avoid non-essential travel, secure basement valuables, and charge mobile devices in case of power outages. If you encounter a flooded roadway, turn around—most flood fatalities occur in vehicles. Those in flood-prone neighborhoods should have an evacuation plan ready.
The flood threat will gradually decrease after midnight, but additional watches or warnings are possible if storms linger or redevelop overnight. Stay tuned for updates as this multi-state weather system continues.
